Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c536b4522a7b0cd29eba31a5a49aa6f7f5d0bbd16b7c76c6e16446db998664b3' 
  AND token = 'ijRF3EGLCxFe0426HlEv0N/EB2SU0fsw3qQx6GMcIco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}